Improvement in molding-machines



M. w. CLARK.

V- Improvement in Molding-Machines.

` 131,666, Patented Sep. 24, 1872.

MILTON W. CLARK, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO R.

' BALL &; CO., OF SAME PLACE.

IMPROVEMENT IN MOLDING-MACHIN'ES.

Specification forming part of Letters Patent No. 131,666, datedSeptember 24, 1872.

`To all 'whom'vlt may concern:

l ing-Machines; and I do herebyjdeclare that the following is a full,clear, and exact description of the same, referencebeing hadto theaccompanying drawing which form a part of this specification, in Which-Figure 1 represents a front `view of such parts of an uprightmolding-machine as are necessary `to illustrate my improvement; Fig. 2represents a vertical section of the same at line A B, Fig. 1, and Fig.3 represents a vertical section of the raising device at line() D, Fig.l. s l 1 This invention consists in certain improved mechanism forraising and depressing the vertical cutter-head spindles in molding andother similar wood-working machines, whereby the operation can beperformed with greater i ease and facility, while at the samertime amore accurate adjustmentof the parts is produced than with the mechanismheretofore in use.

In the drawing, the part marked A represents the frame; B indicates thetable or bed, and C indicates the slide which supports the verticalspindle of the cutter-head, which spin-V dle is not shown in thedrawing, but is to be arranged in the bearings a a upon the slide i O inthe ordinary manner. The slide C is provided with a rack, D,`attached toone of its sides, and is arranged to move up and down between suitableways or grooves on the frame Af; said slide is slottedthrough thecentral part b, and has a clamping screw or bolt, E, arranged throughthe slot b, by means of which it can be firmly clamped against the ame.A shaft, F, extends from the exterior of the frame A to the slide pieceCf, said shaft being provided at its inner end with a disk, G, upon theface of which is a spiral ange or volute, d, that intersects with theteeth c of the rack D (see Fig. 3) in such a manner that when the shaftF and disk are revolved the spiral dan ge, acting upon the teeth c,causes the slide G' to be elevated or depressed,according to thedirection in which the shaft F is revolved, thereby elevating ordepressing the cutter-head. rlhe outer end of the shaft F is providedwith a crank, H, or other suitable device, whereby it can readily beturned when desired. When the cutter-head is properly adjusted it can beretained or held in place by the iiange d and rack D resting againsteach other, since the rack rests upon theiiange at the lower part` of`the disk, in line with vthe center thereof, and the inclination of theliange is so slight that the disk will not be moved by the weight of theslide and cutter-head. The parts can also, if desired, be more firmlysecured in such position by turning up the screw or bolt E, which clampsthe slide G' to the frame A.

It will be observed that with this device the cutter-head-,supportingbearings a, a/ can be raised and depressed very easily to a greater orless extent, so that their position can be adjusted to the greatestdegree of nicety,.con sequently the most accurate adjustment of thecutters possible can be obtained with but very little trouble.

By spindles of molding-machines as used in this specification referenceis had to vertical spindles which support the cutter-heads in allmachines, for either j ointin g, molding, orplaning the edges of boardsor other materials.

Having described my improved raising apparatus for uprightmolding-machines, what I claim as new therein and of my invention, anddesire to secure by Letters Patent, is

The combination, with the bearing-slide C', which, supports Ythevertical cutter-head spindle in a wood-working machine, as specified, ofthe rack D', spiral-hanged disk Gr d, and shaft F, substantially as andfor the purposes set forth.

MILTON W. CLARK. Witnesses:

THos. H. DODGE, Guns. H. BURLEIGH.

